Anti-vaxxers, might be a lot of things, but I doubt being ‘socialists’ is one of them. Socialists love conformity, love the state making the decisions for everybody, and love ridiculing anyone who doesn’t toe the party line.
As a lot of us have pointed out (and this article confirms) there are people who get quite ill from vaccines. I am one of those people.
Socialists (and only socialists) made antivaxxers a word.